If dad's blood type is A+ and mom's is O+, what blood type is the baby?

There are 3 alleles in the population: A, B, or O. Two alleles are inherited. For type A, they will have either AA or AO. Type O will have OO. Rh works in the same way. If Rh +, the person will either have ++ or +-. The baby may end up with A+, A-, O+, or O-.

posted by Anonymous
It's important to note though that both parents have to be heterozygous for O - to be possible (excluding Bombay blood disease). This means the genotype is AaRr for the dad and ooRr for the Mom. 1/16 chance for O-. add a comment

The blood group of a child mainly depends on the genetic factors during the formation of the embryo and cell division. In case of A+ and O+ there are chances for A+ and O+ and there are other chances like grandparent's blood group like A- or O- or AB+ etc